| Place Name | Geronimo |
| Place Type | Census Designated Place |
| ZIP Code(s) | 78155 |
| County | Guadalupe County |
| Area Code(s) | 830 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 903 |
| Population Growth Rate (2010-19) | 6.30% |
| Majority Ethnicity | Hispanic 0% |
| Metro/Micro Stats Area | San Antonio-New Braunfels, TX |
| US Congressional District(s) | Texas 15th |
| State House Districts | 44 |
| State Senate Districts | 21,25 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 37.78% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 62.22% |